separate file reader/writer; add support for http headers

2024-09-19 08:02:31 +00:00 · 2024-09-19 08:02:31 +00:00 · ba9b37f512
commit ba9b37f512
parent 4b38af88a4
5 changed files with 423 additions and 47 deletions
--- a/internal/transport/file.go
+++ b/internal/transport/file.go
@ -6,11 +6,13 @@ import (
 _	"errors"
 	"path/filepath"
 	"io"
+	"io/fs"
 	"os"
 	"net/url"
 	"strings"
 	"fmt"
 	"compress/gzip"
+	"log/slog"
 )

 type File struct {
@ -25,13 +27,93 @@ type File struct {
 	gzipReader io.ReadCloser
 }

+type FileReader struct {
+	*File
+	readHandle *os.File
+	gzipReader io.ReadCloser
+}
+
+type FileWriter struct {
+	*File
+	writeHandle *os.File
+	gzipWriter io.WriteCloser
+}
+
 func FilePath(u *url.URL) string {
 	return filepath.Join(u.Hostname(), u.Path)
 }

 func FileExists(u *url.URL) bool {
 	_, err := os.Stat(FilePath(u))
-	return err == nil
+	return !os.IsNotExist(err)
+}
+
+func NewFileReader(u *url.URL) (f *FileReader, err error) {
+	f = &FileReader {
+		File: &File {
+			uri: u,
+			path: FilePath(u),
+		},
+	}
+	f.extension()
+	f.DetectGzip()
+	exists := FileExists(u)
+	slog.Info("transport.NewFileReader()", "uri", u, "path", f.Path(), "file", f, "error", err, "exists", exists)
+
+	if f.Path() == "" || f.Path() == "-" {
+		f.readHandle = os.Stdin
+	} else {
+		if f.readHandle, err = os.Open(f.Path()); err == nil {
+			var fi fs.FileInfo
+			fi, err = f.readHandle.Stat()
+			if fi.IsDir() {
+				f.readHandle.Close()
+				f.readHandle = nil
+				err = fmt.Errorf("is a directory")
+			}
+		}
+		
+		if err != nil {
+			slog.Info("transport.NewFileReader()", "file", f, "path", f.Path(), "error", err)
+			return
+		}
+	}
+	if f.Gzip() {
+		if exists {
+			if f.gzipReader, err = gzip.NewReader(f.readHandle); err != nil {
+				return
+			}
+		}
+	}
+	slog.Info("transport.NewFileReader() - created reader transport", "uri", u, "file", f, "error", err)
+	return
+}
+
+func NewFileWriter(u *url.URL) (f *FileWriter, err error) {
+	f = &FileWriter {
+		File: &File {
+			uri: u,
+			path: FilePath(u),
+		},
+	}
+	f.extension()
+	f.DetectGzip()
+	exists := FileExists(u)
+	slog.Info("transport.NewFileWriter()", "file", f, "error", err, "exists", exists)
+
+	if f.Path() == "" || f.Path() == "-" {
+		f.writeHandle = os.Stdout
+	} else {
+		if f.writeHandle, err = os.OpenFile(f.Path(), os.O_RDWR|os.O_CREATE, 0644); err != nil {
+			slog.Info("transport.NewFileWriter()", "file", f, "path", f.Path(), "error", err)
+			return
+		}
+	}
+	if f.Gzip() {
+		f.gzipWriter = gzip.NewWriter(f.writeHandle)
+	}
+	slog.Info("transport.NewFileWriter()", "file", f, "error", err)
+	return
 }

 func NewFile(u *url.URL) (f *File, err error) {
@ -41,12 +123,16 @@ func NewFile(u *url.URL) (f *File, err error) {
 	}
 	f.extension()
 	f.DetectGzip()
+	exists := FileExists(u)
+	slog.Info("transport.NewFile()", "file", f, "error", err, "exists", exists)

 	if f.path == "" || f.path == "-" {
 		f.readHandle = os.Stdin
 		f.writeHandle = os.Stdout
 	} else {
+		
 		if f.readHandle, err = os.OpenFile(f.Path(), os.O_RDWR|os.O_CREATE, 0644); err != nil {
+			slog.Info("transport.NewFile()", "file", f, "path", f.Path(), "error", err)
 			return
 		}
 		f.writeHandle = f.readHandle
@ -54,10 +140,13 @@ func NewFile(u *url.URL) (f *File, err error) {

 	if f.Gzip() {
 		f.gzipWriter = gzip.NewWriter(f.writeHandle)
+		if exists {
 			if f.gzipReader, err = gzip.NewReader(f.readHandle); err != nil {
 				return
 			}
 		}
+	}
+	slog.Info("transport.NewFile()", "file", f, "error", err)
 	return
 }

@ -68,10 +157,11 @@ func (f *File) extension() {
 		if numberOfElements > 2 {
 			f.exttype = elements[numberOfElements - 2]
 			f.fileext = elements[numberOfElements - 1]
-		}
+		} else {
 			f.exttype = elements[numberOfElements - 1]
 		}
 	}
+}

 func (f *File) DetectGzip() {
 	f.gzip = (f.uri.Query().Get("gzip") == "true" || f.fileext == "gz") 
@ -101,11 +191,26 @@ func (f *File) Signature() (documentSignature string) {
 }

 func (f *File) ContentType() string {
+	var ext strings.Builder
 	if f.uri.Scheme != "file" {
 		return f.uri.Scheme
 	}
+	if f.fileext == "" {
 		return f.exttype
 	}
+	ext.WriteString(f.exttype)
+	ext.WriteRune('.')
+	ext.WriteString(f.fileext)
+	return ext.String()
+}
+
+func (f *File) Stat() (fs.FileInfo, error) {
+	return f.FileInfo()
+}
+
+func (f *File) FileInfo() (info fs.FileInfo, err error) {
+	return os.Lstat(f.Path())
+}

 func (f *File) SetGzip(gzip bool) {
 	f.gzip = gzip
@ -115,16 +220,25 @@ func (f *File) Gzip() bool {
 	return f.gzip
 }

-func (f *File) Reader() io.ReadCloser {
+func (f *FileReader) Reader() io.ReadCloser {
 	if f.Gzip() {
+		var err error
+		if f.gzipReader, err = gzip.NewReader(f.readHandle); err != nil {
+			panic(err)
+		}
 		return f.gzipReader
 	}
 	return f.readHandle
 }

-func (f *File) Writer() io.WriteCloser {
+func (f *FileWriter) Writer() io.WriteCloser {
 	if f.Gzip() {
+		f.gzipWriter = gzip.NewWriter(f.writeHandle)
 		return f.gzipWriter
 	}
 	return f.writeHandle
 }
+
+func (f *File) ReadWriter() io.ReadWriteCloser {
+	return f.writeHandle
+}
--- a/internal/transport/http.go
+++ b/internal/transport/http.go
@ -10,26 +10,34 @@ _	"os"
 	"net/http"
 	"strings"
 	"fmt"
-	"bytes"
 	"context"
 	"path/filepath"
+	"log/slog"
+	"io/fs"
 )

-type BufferCloser struct {
-	stream io.Closer
-	*bytes.Buffer
+type Pipe struct {
+	Reader io.ReadCloser
+	Writer io.WriteCloser
+}
+
+type HTTPConnection struct {
+	stream *Pipe
+	request *http.Request
+	response *http.Response
+	Client *http.Client
 }

 type HTTP struct {
 	uri *url.URL
 	path string
+	gzip bool
 	exttype string
 	fileext string
-	buffer BufferCloser
-	getRequest *http.Request
-	getResponse *http.Response
-	postRequest *http.Request
-	postResponse *http.Response
+
+	ctx context.Context
+	get *HTTPConnection
+	post *HTTPConnection
 	Client *http.Client
 }

@ -37,26 +45,99 @@ func HTTPExists(u *url.URL) bool {
 	return false
 }

-func (b BufferCloser) Close() error {
-	if b.stream != nil {
-		return b.stream.Close()
+func NewPipe() *Pipe {
+	r,w := io.Pipe()
+	return &Pipe{ Reader: r, Writer: w }
 }
-	return nil
+
+func NewHTTPConnection(client *http.Client) *HTTPConnection {
+	return &HTTPConnection {
+		Client: client,
+	}
+}
+
+func (h *HTTPConnection) NewPostRequest(ctx context.Context, uri string) (err error) {
+	h.stream = NewPipe()
+	h.request, err = http.NewRequestWithContext(ctx, "POST", uri, h.Reader())
+	return
+}
+
+func (h *HTTPConnection) NewGetRequest(ctx context.Context, uri string) (err error) {
+	h.request, err = http.NewRequestWithContext(ctx, "GET", uri, nil)
+	return
+}
+
+func (h *HTTPConnection) Request() *http.Request {
+	return h.request
+}
+
+func (h *HTTPConnection) Response() *http.Response {
+	return h.response
+}
+
+func (h *HTTPConnection) Writer() io.WriteCloser {
+	return h.stream.Writer
+}
+
+func (h *HTTPConnection) Reader() io.ReadCloser {
+	return h.stream.Reader
+}
+
+func (h *HTTPConnection) Do() (err error) {
+	slog.Info("transport.HTTPConnection.Do()", "connection", h)
+	h.response, err = h.Client.Do(h.request)
+	return
+}
+
+func (h *HTTPConnection) Read(p []byte) (n int, err error) {
+	if h.response == nil {
+		if err = h.Do(); err != nil {
+			return
+		}
+	}
+	return h.response.Body.Read(p)
+}
+
+func (h *HTTPConnection) Write(p []byte) (n int, err error) {
+	if h.response == nil {
+		if err = h.Do(); err != nil {
+			return
+		}
+	}
+	slog.Info("transport.HTTPConnection.Write()", "data", p, "connection", h)
+	return h.Writer().Write(p)
+}
+
+func (h *HTTPConnection) ReadFrom(r io.Reader) (n int64, err error) {
+	h.request.Body = r.(io.ReadCloser)
+	if h.response == nil {
+		if err = h.Do(); err != nil {
+			return
+		}
+	}
+	return h.request.ContentLength, nil
+}
+
+func (h *HTTPConnection) Close() (err error) {
+	if h.response != nil {
+		defer h.response.Body.Close()
+	}
+	if h.stream != nil {
+		err = h.Writer().Close()
+	}
+	return
 }

 func NewHTTP(u *url.URL, ctx context.Context) (h *HTTP, err error) {
 	h = &HTTP {
+		ctx: ctx,
 		uri: u,
 		path: filepath.Join(u.Hostname(), u.RequestURI()),
 		Client: http.DefaultClient,
 	}
-	h.extension()

-	h.postRequest, err = http.NewRequestWithContext(ctx, "POST", u.String(), h.buffer)
-	if err != nil {
-		return
-	}
-	h.getRequest, err = http.NewRequestWithContext(ctx, "GET", u.String(), nil)
+	h.extension()
+	h.DetectGzip()
 	return
 }

@ -70,6 +151,10 @@ func (h *HTTP) extension() {
 	h.exttype = elements[numberOfElements - 1]
 }

+func (h *HTTP) DetectGzip() {
+	h.gzip = (h.uri.Query().Get("gzip") == "true" || h.fileext == "gz") 
+}
+
 func (h *HTTP) URI() *url.URL {
 	return h.uri
 }
@ -79,8 +164,8 @@ func (h *HTTP) Path() string {
 }

 func (h *HTTP) Signature() (documentSignature string) {
-	if h.getResponse != nil {
-		documentSignature = h.getResponse.Header.Get("Signature")
+	if h.get.Response() != nil {
+		documentSignature = h.get.Response().Header.Get("Signature")
 		if documentSignature == "" {
 			signatureResp, signatureErr := h.Client.Get(fmt.Sprintf("%s.sig", h.uri.String()))
 			if signatureErr == nil {
@ -95,8 +180,12 @@ func (h *HTTP) Signature() (documentSignature string) {
 	return documentSignature
 }

+func (h *HTTP) Stat() (info fs.FileInfo, err error) {
+	return
+}
+
 func (h *HTTP) ContentType() (contenttype string) {
-	contenttype = h.getResponse.Header.Get("Content-Type")
+	contenttype = h.get.Response().Header.Get("Content-Type")
 	switch contenttype {
 	case "application/octet-stream":
 		return h.exttype
@ -105,22 +194,50 @@ func (h *HTTP) ContentType() (contenttype string) {
 	return
 }

+func (h *HTTP) SetGzip(gzip bool) {
+	h.gzip = gzip
+}
+
 func (h *HTTP) Gzip() bool {
-	return h.fileext == "gz"
+	return h.gzip
 }

 func (h *HTTP) Reader() io.ReadCloser {
-	var err error
-	if h.getResponse, err = h.Client.Do(h.getRequest); err != nil {
+	if h.get == nil {
+		h.get = NewHTTPConnection(h.Client)
+		if err := h.get.NewGetRequest(h.ctx, h.uri.String()); err != nil {
 			panic(err)
 		}
-	return h.getResponse.Body
+	}
+	return h.get
 }

 func (h *HTTP) Writer() io.WriteCloser {
-	var err error
-	if h.postResponse, err = h.Client.Do(h.postRequest); err != nil {
+	if h.post == nil {
+		h.post = NewHTTPConnection(h.Client)
+		if err := h.post.NewPostRequest(h.ctx, h.uri.String()); err != nil {
 			panic(err)
 		}
-	return h.buffer
+	}
+	return h.post
+}
+
+func (h *HTTP) ReadWriter() io.ReadWriteCloser {
+	return nil
+}
+
+func (h *HTTP) GetRequest() *http.Request {
+	return h.get.Request()
+}
+
+func (h *HTTP) GetResponse() *http.Response {
+	return h.get.Response()
+}
+
+func (h *HTTP) PostRequest() *http.Request {
+	return h.post.Request()
+}
+
+func (h *HTTP) PostResponse() *http.Response {
+	return h.post.Response()
 }
--- a/internal/transport/http_test.go
+++ b/internal/transport/http_test.go
@ -5,17 +5,102 @@ package transport
 import (
 	"github.com/stretchr/testify/assert"
 	"testing"
-_	"fmt"
+	"fmt"
 _	"os"
+	"io"
 	"net/url"
 _	"path/filepath"
 	"context"
+	"net/http"
+	"net/http/httptest"
 )

 func TestNewTransportHTTPReader(t *testing.T) {
-	u, urlErr := url.Parse("https://localhost/resource")
+	//ctx := context.Background()
+
+	body := []byte(`
+type: "user"
+attributes:
+  name: "foo"
+  gecos: "foo user"
+`)
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		assert.Equal(t, req.URL.String(), "/resource/user")
+		n,e := rw.Write(body)
+		assert.Nil(t, e)
+		assert.Greater(t, n, 0)
+		assert.Equal(t, "bar", req.Header.Get("foo"))
+	}))
+	defer server.Close()
+
+	u, urlErr := url.Parse(fmt.Sprintf("%s/resource/user", server.URL))
 	assert.Nil(t, urlErr)
 	h, err := NewHTTP(u, context.Background())
 	assert.Nil(t, err)
 	assert.NotNil(t, h)
+	h.Reader()
+	h.GetRequest().Header.Add("foo", "bar")
+
+	resData, readErr := io.ReadAll(h.Reader())
+	assert.Nil(t, readErr)
+	assert.Greater(t, len(resData), 0)
+	assert.Equal(t, body, resData)
+}
+
+func TestNewTransportHTTPWriter(t *testing.T) {
+	body := []byte(`
+type: "user"
+attributes:
+  name: "foo"
+  gecos: "foo user"
+`)
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		assert.Equal(t, req.URL.String(), "/resource/user")
+		n, postBody := io.ReadAll(req.Body)
+		
+		assert.Greater(t, n, 0)
+		assert.Equal(t, "bar", req.Header.Get("foo"))
+		assert.Equal(t, body, postBody)
+	}))
+	defer server.Close()
+
+	u, urlErr := url.Parse(fmt.Sprintf("%s/resource/user", server.URL))
+	assert.Nil(t, urlErr)
+	h, err := NewHTTP(u, context.Background())
+	assert.Nil(t, err)
+	assert.NotNil(t, h)
+	h.Writer()
+	h.PostRequest().Header.Add("foo", "bar")
+
+//	_, writeErr := h.Writer().Write(body)
+//	assert.Nil(t, writeErr)
+}
+
+func TestNewHTTPConnection(t *testing.T) {
+	ctx := context.Background()
+	h := NewHTTPConnection(http.DefaultClient)
+	assert.NotNil(t, h)
+
+	body := []byte(`
+type: "user"
+attributes:
+  name: "foo"
+  gecos: "foo user"
+`)
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		assert.Equal(t, req.URL.String(), "/resource/user")
+		n,e := rw.Write(body)
+		assert.Nil(t, e)
+		assert.Greater(t, n, 0)
+		assert.Equal(t, "bar", req.Header.Get("foo"))
+	}))
+	defer server.Close()
+
+	uri := fmt.Sprintf("%s/resource/user", server.URL)
+
+	assert.Nil(t, h.NewGetRequest(ctx, uri))
+	h.Request().Header.Add("foo", "bar")
+	responseData, responseErr := io.ReadAll(h)
+	assert.Nil(t, responseErr)
+	assert.Equal(t, body, responseData)
 }
--- a/internal/transport/transport.go
+++ b/internal/transport/transport.go
@ -10,6 +10,7 @@ _	"net/http"
 _	"strings"
 _	"path/filepath"
 	"io"
+	"io/fs"
 _	"os"
 	"context"
 )
@ -17,9 +18,17 @@ _	"os"
 type Handler interface {
 	URI() *url.URL
 	ContentType() string
+	SetGzip(bool)
 	Gzip() bool
 	Signature() string
+	Stat() (fs.FileInfo, error)
+}
+
+type HandlerReader interface {
 	Reader() io.ReadCloser
+}
+
+type HandlerWriter interface {
 	Writer() io.WriteCloser
 }

@ -31,7 +40,10 @@ type Reader struct {
 }

 func NewReader(u *url.URL) (reader *Reader, e error) {
-	ctx := context.Background()
+	return NewReaderWithContext(u, context.Background())
+}
+
+func NewReaderWithContext(u *url.URL, ctx context.Context) (reader *Reader, e error) {
 	reader = &Reader{ uri: u }
 	switch u.Scheme {
 	case "http", "https":
@ -39,10 +51,10 @@ func NewReader(u *url.URL) (reader *Reader, e error) {
 	case "file":
 		fallthrough
 	default:
-		reader.handle, e = NewFile(u)
+		reader.handle, e = NewFileReader(u)
 		reader.exists = func() bool { return FileExists(u) }
 	}
-	reader.SetStream(reader.handle.Reader())
+	reader.SetStream(reader.handle.(HandlerReader).Reader())
 	return
 }

@ -62,18 +74,23 @@ type Writer struct {
 }

 func NewWriter(u *url.URL) (writer *Writer, e error) {
-	ctx := context.Background()
+	return NewWriterWithContext(u, context.Background())
+}
+
+func NewWriterWithContext(u *url.URL, ctx context.Context) (writer *Writer, e error) {
 	writer = &Writer{ uri: u }
+
 	switch u.Scheme {
 	case "http", "https":
 		writer.handle, e = NewHTTP(u, ctx)
 	case "file":
 		fallthrough
 	default:
-		writer.handle, e = NewFile(u)
+		writer.handle, e = NewFileWriter(u)
 		writer.exists = func() bool { return FileExists(u) }
 	}
-	writer.SetStream(writer.handle.Writer())
+
+	writer.SetStream(writer.handle.(HandlerWriter).Writer())
 	return writer, e
 }

@ -117,10 +134,18 @@ func (r *Reader) ContentType() string {
 	return r.handle.ContentType()
 }

+func (r *Reader) SetGzip(value bool) {
+	r.handle.SetGzip(value)
+}
+
 func (r *Reader) Gzip() bool {
 	return r.handle.Gzip()
 }

+func (r *Reader) Stat() (info fs.FileInfo, err error) {
+	return r.handle.Stat()
+}
+
 func (r *Reader) Signature() string {
 	return r.handle.Signature()
 }
@ -129,6 +154,17 @@ func (r *Reader) SetStream(s io.ReadCloser) {
 	r.stream = s
 }

+func (r *Reader) AddHeader(name string, value string) {
+	r.handle.(*HTTP).GetRequest().Header.Add(name, value)
+}
+
+func (r *Reader) Status() string {
+	return r.handle.(*HTTP).GetResponse().Status
+}
+
+func (r *Reader) StatusCode() int {
+	return r.handle.(*HTTP).GetResponse().StatusCode
+}

 func (w *Writer) Exists() bool { return w.exists() }

@ -136,6 +172,14 @@ func (w *Writer) Write(b []byte) (int, error) {
 	return w.stream.Write(b)
 }

+func (w *Writer) ReadFrom(r io.Reader) (n int64, e error) {
+	if v, ok := w.stream.(io.ReaderFrom); ok {
+		return v.ReadFrom(r)
+	} else {
+		panic("io.ReaderFrom interface not supported by writer")
+	}
+}
+
 func (w *Writer) Close() error {
 	return w.stream.Close()
 }
@ -144,6 +188,10 @@ func (w *Writer) ContentType() string {
 	return w.handle.ContentType()
 }

+func (w *Writer) SetGzip(value bool) {
+	w.handle.SetGzip(value)
+}
+
 func (w *Writer) Gzip() bool {
 	return w.handle.Gzip()
 }
@ -155,3 +203,15 @@ func (w *Writer) Signature() string {
 func (w *Writer) SetStream(s io.WriteCloser) {
 	w.stream = s
 }
+
+func (w *Writer) AddHeader(name string, value string) {
+	w.handle.(*HTTP).PostRequest().Header.Add(name, value)
+}
+
+func (w *Writer) Status() string {
+	return w.handle.(*HTTP).PostResponse().Status
+}
+
+func (w *Writer) StatusCode() int {
+	return w.handle.(*HTTP).PostResponse().StatusCode
+}
--- a/internal/transport/transport_test.go
+++ b/internal/transport/transport_test.go
@ -62,7 +62,7 @@ func TestTransportReaderContentType(t *testing.T) {
 	assert.True(t, reader.Exists())
 	assert.NotNil(t, reader)

-	assert.Equal(t, reader.ContentType(), "yaml")
+	assert.Equal(t, "jx.yaml", reader.ContentType())
 }

 func TestTransportReaderDir(t *testing.T) {